Oricymba sp.

Samant, Bandana, Kumar, Arun, Mohabey, D. M., Humane, Sumedh, Kumar, Deepesh, Dhoble, Anup & Pizal, Priya, 2020, Centropyxis aculeata (testate lobose amoebae) and associated diatoms from the intertrappean lacustrine sediments (Maastrichtian) of central India: Implications in understanding paleolake ecology, Palaeontologia Electronica (a 60) 23 (3), pp. 1-18 : 10

Oricymba sp. (? tianmuensis)

Figure 6.4

Description. Valve shows uniseriate-biseriate striae. The distal raphe ends offset; bent slightly towards the dorsal margin. Striae show a strong tendency to become biseriate, circular, laterally elongate or irregular triangular areolae.

Dimensions. Length 12.5 µm, width 0.90-2.5 µm, striae 28-30 in 10µm.

Sponge Spicules

Sponge spicules are present in this microfossil assemblage as well, and they broadly show similarity with spicules of the extant genus Corvospongilla . A detailed study of sponge spicules recorded from these sediments is in progress.

Figures

FIGURE 6. 1. SEM photograph of Centropyxis aculeata (Ehrenberg, 1832). 2. SEM photographs of the centric diatom Pantocsekiella sp. (internal valve view) on the test of Centropyxis aculeata (Ehrenberg, 1832). 3 and 5. SEM photographs of the pennate diatom Achnanthes sp. on the test of Centropyxis aculeata (Ehrenberg, 1832). 4. SEM photograph of the pennate diatom Oricymba sp. on the wall of Centropyxis aculeata (Ehrenberg, 1832). 6. SEM photograph of the pennate diatom Diadesmis sp. on the wall of Centropyxis aculeata (Ehrenberg, 1832).